Sectional steam-boiler.



N0. 7l0,420. Patented Oct. 7, I902.

l-l. BRADLEY.

SECTIONAL STEAM BOILER.

' (Application filed Jm. 16, 1901. Renewed Jan. 17, 1902.)

4 shear-sheet (No Model.)

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No. 710,420. Patented Oct. 7, I902.

n. BRADLEY. SEGTIONAL STEAM BOILER.

A mimmi filed ml. 16, 1901 Renewed mm. 17, 1902.

4 Sheets-Shut 2.

(lo Model.)

No. 7|o,42o. I Patented Oct. 7,1902.

11. BRADLEY.

SEOTIONAL STEAM BOILER.

(Application filed Jan. 10, 1901. Renewed Jan. 17, 1902.

4 Shuts-Sheet 3.

{No Model.)

THE uonms PETER} 00.. we're-1.111401. \vAsumaTom n. c.

Patented Oct. 7-, I902.

H. BRADLEY.

SECTIONAL STEAM BOILER. (Application fllad Ian. 16, 1901. Renewed Jan. 17; 1902.) (u Model.) '4 Sheets-Sheet 4.

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UNITED STAT I PATENT OFFICE HENRY BRADLEY, OF RICHMOND, .NEw'YoRK.

SECTIONAL STEAM-BOILER.

SPECIFICATION formingpart of Letters Patent N 0. 710,420, dated October 7, 1902.

Application filed January 16, 1901. Renewed January 17, 1902. Serial No. 90,187. (No model.)

To alt whom. it mag concern.-

Be it known that I, HENRY BRADLEY, a citi-' zen of the United States, residing in the borough of Richmond, in the city and State of New York, have invented certa n new and useful Improvements in Sectional Steam-Boilers, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof.

The improvements relate and are applicable to stationary and locomotive boilers and to steam-generators variously employed and used.

The principal objects of the invention are to produce steam more rapidly and at a higher pressure than is done in boilers as heretofore constructed, to provide room for the greater volume of steam by making provision forheating a less volume of water at one time, to consume less fuel in generating the steam, and to increase the capacity and ellicieucy of a boiler having a grate or heating-surface of given area.

To these ends the invention consists of a steam-boiler having hollow sections or compartments for containing water, said sections being arranged one above another and provided with means for permitting the water to fiowat a determined level from the sections above to those beneath, in combination with steam-receivin g chambers for the several sections and means for conducting the steam to an outlet connection, and in the constructive features hereinafter more fully described,and

pointed out in the claims.

In the accompanying drawings, Figurel is a front view ofa stationary steam-boiler embodyingtheimprovements. Thisfigureshows the doors through which access may be had to the ash-pit, to the fire-box, and to the interior of the boiler-above the fire-box, also the water-inlet and steam-outlet pipes, water and steam indicators, steam-chest, and part of smoke-stack. Fig. 2 is a vertical section back of the doors and front shown by Fig. 1, giving a front view of the compartments or secti0ns and their various water and steam connections and also the interior arrange- IHGIIU Of' thefire-chamber. Fig. 3 is a longitudinal vertical view taken on the line 3 3 of Fig. 2, showing the middle and end compartments-in section and all others in a side view looking from the interior. Fig. 4 is a plan view of the bottom sections, the upper compartments being removed, as indicated'by the line 4 4 of Fig. 2, and the water and steam pipes connecting with the compartments next above being shown in section. This View also shows the front and rear bottom sections forming the ends and their steam connections. Fig. 5 is a perspective view of: one of the in terior sections, showing steam and Water connections for making communication with the side and end sections. Figs. 6 and? are detail sectional views on the lines-y y andm w of Fig. 2 of the end portions of the sections one above another and respectively show the water and steam connections bet-ween the sections lying in different planes. Figs. 8 and 9 are respectively bottom and top perspectives of the smoke-box.

In the drawings,A and A, respectively,represent the outer and inner walls, .forming shells for the sides and ends of the boiler, which shells or sides also form compartments for water and steam. The top or root of the boiler has outer and inner walls B and B, and the spaces between them in like manner form sections or compartments for water and steam. The side compartments and those at the top have closed edges, forming lap-joints, so that they may rest securely one upon another, as indicated at a and a",'the upper edges of the top sections being brought against and joined to a smoke-box B as shown at a or they may be seen red in any desired manner. The front and back are also shown as being formed into compartments similar to those of the sides, except so much as is taken up for doorspace, and have projecting lugs or ears 0 at each edge, and these lugs have holes which receive lock-bars C for clamping the different parts of the structure together. The upper side sections may also be provided with lugs 1') and the top sect-ions with corresponding lugs 11, these lugs being adapted to receive bolts cfor clamping or holding the top sections firmly in place.

In a stationary boiler, such as that shown, the grate-bar D and ash-pit D may have the usual location and be of any desired form of construction, accessible from the outside by doors E and E, but a door E is also shown for the purpose of permitting access to the those at the: sides and above the grate and fuel-space. The inner walls of side sections preferably take a conformation which presents a large heating-surface and is adapted to direct heat or flames upwardly along the sides, thereby bringing the heat in more direct contact with the sections above.

The interior sections of the boiler are preferably arranged with a view to having the water-inlet and steam-outlet connections at the top of the boiler. Asshown, the watersupply pipeF leads into the water-space in one of the top sections formed by the walls B and B and communicates with the other top section by a pipe F, the water-line in such sections being indicated by the shading. From these sections water-pipes d and 01 provide for an overflow for the water from the level determined for it, and these pipes lead downwardly to a point near the bottom of the section F next below, the water-level in that section being indicated by a line. The sec tion F is shown as being adapted in form to the space which it occupies under the roof or top of the boiler and is connected at each side short pipes between them, and so two sections G and G are shown as coming on a somewhatlower plane than that of section F These sections receive the overflow from the section F through a pipe f, and they have water and steam connections with each other by pipes f and f but do not connect with side sections. A water-pipe f takes the overflow from the section G to a centrally-located section H, which in turn is connected by water and steam pipes g g with somewhat-narrower sections H and H", located at each side, but having no connection with the side sections. The next-lower sections I and I are fed by the pipe g leading from the section H, and these sections are connected with each other and with the side and end sections by waterpipes h h 71 and steam-pipes h 71 Beneath the sections I and I is another series of sections J, J, and J similar to the sections H, H, and H These sections are fed by a pipe 2, leading from the section I, and have water and steam connections with each other by pipes t" '6 but no connection with the sections at the sides. The next-lower sections K and K take the overflow through the pipe 11 from the section J and are connected with each other by water and steam pipesjj, as shown, but are not connected with the side sections. Below the sections K K are the sections L L L fed by a pipe f, and connect with each other by water and steam pipes 7c but have no connections with the side sections. The next-lower sections M M come just above the fire-box and are fed by a pipe Z2 and are com nected with each other by water and steam pipes Z l and with the lower side and end sections by. water-pipes Z 1 and the steam-pipes m 'm. In each and all of these sections the water-line may be fixed by the location of the overflow-pipe so as to allow only a shallow body of water in each of the interior sections,

while in the side sections it has greater depth,

but is thin in a horizontal direction or that which is exposed to the heat, or provision may be made for fixing the depth of the water by regulating the point of its admittance into the overflow-pipes, as by the use of plugs or valves. The result is that the heat is rapidly forming the water into steam in all parts of the boiler, and the steam so formed is accumulating pressure; but an ample steam-space is afforded in the various sections on account of the shallow body of water and pipe connections.

The steam-receiving chambers for the various sections or compartments may be formed by spaces above the water in them or separate chambers may be provided and connected with them by pipes or other means of communicationn The drawings show the steamspaces above the water-line in each section, and this arrangement illustrates the action which takes place and the mode of taking care of the steam as fast as it is generated.

The steam-space in the lower side and end sections connect with the sections M M by means of the pipes m m, and the steam-space in the sections M M communicate by the steam-pipe 'm with the steam-space above the water-line in the section L. The sections L, L, and L have their steam-spaces communicating with each other by the pipes 70', and a pipe n takes the steam from the section L to the section K, and a pipej makes connections between the steam-spaces in the sections K K. The steam ascends from the sections K K through a pipe or to the section J next above and from sections J J J through the pipe n to section I, the steam-chamber in which is connected by a pipe 0 with that in the section H. The steam passes up from the section H through a pipe 0 to the steamchamber in section (3', the steam-space in which connects by the pipe 0 with that in the section F and the steam-space in the section F is connected with that in the two top sections by the pipes 19 p. The steam rises from the chambers in the two top sections and passes through the pipes 19 p to the steamchest Q (shown in Fig. 1) and is conducted away from the boiler and used as desired.

The smoke-box B is constructed so as to extend along the top of the boiler from front to rear and in its under side'is provided with a row of smoke-holes r, the largest being at the ends and diminishing in diameter toward the center. The purpose of this arrangement This smokebox is also provided with a door 1' at the ends, so as to, permit of cleaning.

The end sections (shown in Figs. 1, 3, 4-) are connected with the interior sections by steam and water pipes, and the door-space is located between the sections at the ends. The front door E is similar in form to a door at the rear, (shown in Fig. 3,) which is provided on its inside with damper-flaps s s 3, connected to an upright rod 5, operated from the outside by a lever 3 This arrangement permits of a direct draft from either the front or rear of the fire-box t0 the smoke-stack in the top and allows whatever regulation may be required.

The course of the fire and heat will be toward the sides and ends until interrupted by certain of the sections which turn it inward and upward, and the passage toward the smoke-box will again be outward, and so on in a zigzag upward direction until it reaches the smoke-box. This arrangement heatsall the water-chambers and keeps the heat in contact with them a sufiicient time to insure a rapid conversion of the water into steam, which passes through the steam-pipes and connections from the lowest set of communicating sections to those above until it reaches the steam-drum, from which it is taken and utilized for whatever purpose needed.

Of course variations in the details of construction and arrangement can readily be made in the building of these boilers.

Having thus described my invention, What I claim as new, and desire to secure by Letters Patent, is

1. A steam-boiler having hollow sections for containing water, means for supplying water thereto, said sections being arranged, one above another and adapted to hold water to a certain depth and provided with means for permitting an overflow of the water when at said depth in the sections above, to those beneath, in combination with steam-receiving chambers for the several sections and means for conducting the steam to an outlet connection, substantially as described.

2. A steam-boiler having hollow sections and chambers forcontaining water and steam, said sections being arranged one above another and provided with means for permitting the water to flow, at a given level in the sections above, to those beneath, the steamchambers of the several sections having communication with the steam-chambers of the sections above, whereby the quantity of water may be regulated and the steam conducted from each section, substantially as described.

3. A steam-boiler having hollow sections for containing water and steam, said sections being arranged one above another, and sections at the sides of the boiler having steam and water connections with some of the interior sections, but no such connections with others, the latter being arranged to change the course of the heat, the level of the water in the various sections being fixed to admit of an overflow from one section to another,

and the steam-space of each section having communication with the steam-spaces in the sections above, substantially as described.

at. A steam-boiler constructed of compartments fitted one to another, the top sections forming a roof, a smoke-box extending the length of the boiler and secured to the top sections, said smoke-box having a smokestack suitably located and apertures in the bottom of said box, the apertures having greater or less diameter according to the distance from or proximity to the smoke-stack, substantially as described.

, HENRY BRADLEY. 'Witnesses:

B. S. WISE, H. T. 'BANNING. 

